ethernet: micrel: Use DIV_ROUND_CLOSEST directly to make it readable

The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d
but is perhaps more readable.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/micrel/ksz884x.c

@@ -2166,7 +2166,7 @@ static void sw_get_broad_storm(struct ksz_hw *hw, u8 *percent)
 	num = (data & BROADCAST_STORM_RATE_HI);
 	num <<= 8;
 	num |= (data & BROADCAST_STORM_RATE_LO) >> 8;
-	num = (num * 100 + BROADCAST_STORM_VALUE / 2) / BROADCAST_STORM_VALUE;
+	num = DIV_ROUND_CLOSEST(num * 100, BROADCAST_STORM_VALUE);
 	*percent = (u8) num;
 }